mktag.c: improve verification of tagger field and tests

Since nearly its birth, git's tags have included a "tagger" field which
describes the name of tagger, email of tagger, and date and time of tagging.
But, this field was only loosely tested by git-mktag. Provide some thorough
testing for this field and also ensure that the tag header is separated
from the tag body by an empty line to reduce the convenience of creating
a flawed tag.

Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 124 insertions, 5 deletions

diff --git a/t/t3800-mktag.sh b/t/t3800-mktag.sh
index bdc6e132c..8a2740075 100755
--- a/t/t3800-mktag.sh
+++ b/t/t3800-mktag.sh
@@ -44,6 +44,8 @@ cat >tag.sig <<EOF
 xxxxxx 139e9b33986b1c2670fff52c5067603117b3e895
 type tag
 tag mytag
+tagger . <> 0 +0000
+
 EOF
 
 check_verify_failure '"object" line label check' '^error: char0: .*"object "$'
@@ -55,6 +57,8 @@ cat >tag.sig <<EOF
 object zz9e9b33986b1c2670fff52c5067603117b3e895
 type tag
 tag mytag
+tagger . <> 0 +0000
+
 EOF
 
 check_verify_failure '"object" line SHA1 check' '^error: char7: .*SHA1 hash$'
@@ -66,6 +70,8 @@ cat >tag.sig <<EOF
 object 779e9b33986b1c2670fff52c5067603117b3e895
 xxxx tag
 tag mytag
+tagger . <> 0 +0000
+
 EOF
 
 check_verify_failure '"type" line label check' '^error: char47: .*"\\ntype "$'
@@ -85,6 +91,8 @@ cat >tag.sig <<EOF
 object 779e9b33986b1c2670fff52c5067603117b3e895
 type tag
 xxx mytag
+tagger . <> 0 +0000
+
 EOF
 
 check_verify_failure '"tag" line label check #1' \
@@ -121,6 +129,8 @@ cat >tag.sig <<EOF
 object 779e9b33986b1c2670fff52c5067603117b3e895
 type tagggg
 tag mytag
+tagger . <> 0 +0000
+
 EOF
 
 check_verify_failure 'verify object (SHA1/type) check' \
@@ -133,6 +143,8 @@ cat >tag.sig <<EOF
 object $head
 type commit
 tag my	tag
+tagger . <> 0 +0000
+
 EOF
 
 check_verify_failure 'verify tag-name check' \
@@ -145,10 +157,12 @@ cat >tag.sig <<EOF
 object $head
 type commit
 tag mytag
+
+This is filler
 EOF
 
 check_verify_failure '"tagger" line label check #1' \
-	'^error: char70: could not find "tagger"$'
+	'^error: char70: could not find "tagger "$'
 
 ############################################################
 # 12. tagger line label check #2
@@ -158,19 +172,124 @@ object $head
 type commit
 tag mytag
 tagger
+
+This is filler
 EOF
 
 check_verify_failure '"tagger" line label check #2' \
-	'^error: char70: could not find "tagger"$'
+	'^error: char70: could not find "tagger "$'
 
 ############################################################
-# 13. create valid tag
+# 13. detect missing tag author name
 
 cat >tag.sig <<EOF
 object $head
 type commit
 tag mytag
-tagger another@example.com
+tagger  <> 0 +0000
+
+This is filler
+EOF
+
+check_verify_failure 'detect missing tag author name' \
+	'^error: char77: missing tagger name$'
+
+############################################################
+# 14. detect missing tag author name
+
+cat >tag.sig <<EOF
+object $head
+type commit
+tag mytag
+tagger T A Gger <
+ > 0 +0000
+
+EOF
+
+check_verify_failure 'detect malformed tagger' \
+	'^error: char77: malformed tagger$'
+
+############################################################
+# 15. allow empty tag email
+
+cat >tag.sig <<EOF
+object $head
+type commit
+tag mytag
+tagger T A Gger <> 0 +0000
+
+EOF
+
+test_expect_success \
+    'allow empty tag email' \
+    'git-mktag <tag.sig >.git/refs/tags/mytag 2>message'
+
+############################################################
+# 16. detect missing tag timestamp
+
+cat >tag.sig <<EOF
+object $head
+type commit
+tag mytag
+tagger T A Gger <tagger@example.com>  
+
+EOF
+
+check_verify_failure 'detect missing tag timestamp' \
+	'^error: char107: malformed tag timestamp$'
+
+############################################################
+# 17. detect invalid tag timestamp
+
+cat >tag.sig <<EOF
+object $head
+type commit
+tag mytag
+tagger T A Gger <tagger@example.com> Tue Mar 25 15:47:44 2008
+
+EOF
+
+check_verify_failure 'detect invalid tag timestamp' \
+	'^error: char108: malformed tag timestamp$'
+
+############################################################
+# 18. detect invalid tag timezone
+
+cat >tag.sig <<EOF
+object $head
+type commit
+tag mytag
+tagger T A Gger <tagger@example.com> 1206478233 GMT
+
+EOF
+
+check_verify_failure 'detect invalid tag timezone' \
+	'^error: char118: malformed tag timezone$'
+
+############################################################
+# 19. detect invalid header entry
+
+cat >tag.sig <<EOF
+object $head
+type commit
+tag mytag
+tagger T A Gger <tagger@example.com> 1206478233 -0500
+this line should not be here
+
+EOF
+
+check_verify_failure 'detect invalid header entry' \
+	'^error: char124: trailing garbage in tag header$'
+
+############################################################
+# 20. create valid tag
+
+cat >tag.sig <<EOF
+object $head
+type commit
+tag mytag
+tagger T A Gger <tagger@example.com> 1206478233 -0500
+
 EOF
 
 test_expect_success \
@@ -178,7 +297,7 @@ test_expect_success \
     'git-mktag <tag.sig >.git/refs/tags/mytag 2>message'
 
 ############################################################
-# 14. check mytag
+# 21. check mytag
 
 test_expect_success \
     'check mytag' \